Please help, I do not know what the problem is, hangs laptop keyboard. Cause and effect can not reveal. A software problem, because the keyboard is not in windows crashes, and sometimes she “unhangs” and all keystrokes during hover, pressed in time. When the keyboard is in a hung state, does not work enables \ disables the backlight. Also, there hangs on any key, such as «testttttttttttttttt …». Sometimes the keyboard itself “unhangs”, or helps standby or restart. The problem is very Random, for example can not hang out 5 days and then hang up every night. If you connect a usb keyboard, it works, notebook remains unresponsive.